Alloy



Patented Mar 24, 1931 UNITED STATES PATENT OFFICE HARRY KLAUSMANN, OF 'MA PICEWOOD, AND HENRY R. KIEPE, OF NEWARK, JERSEY, ASSIGNORS TO BAKER 8c COMPANY, INC., A CORPORATION OE NEW JERSEY ALLOY No Drawing.

a better color and whiter thanpalladium; to

thus secure an alloy which can be used in place of palladium for certain purposes and be of a white and beautiful color as well as 50 capable 'ofresisting wear and having some temper, and to secure other advantages and results as may be brought out in the .following description. a p

In carrying out our invention we produce '15 an alloy of palladium, rhodium and ruthe-' nium by using the three Iuetals together in substantially the following proportions, seventy-five percent (75%) to ninety-eight percent (98%) oi palladium, twenty-four percent (24%) to one percent (1%) of rhodium and the rest ruthenium. Probably the best proportions for jewelry are-ninety-five percent (95%) of palladium, three percent (3%) of rhodium and two percent (2%) ru- 25 thenium, but the proportions can be varied,

within the limits above stated, to secure dif-.

ferent degrees of hardness and gradations ofwhiteness, some of the 'advantages'of our within the said limits.

As has been indicated, an increase in rhodicreases the hardness or wearing qualities of the alloy; Indeed, either of these 'two metals invention being secured by any proportions Application flled' lay 3, 1930. Serial No. 449,681.

ing qualities of palladium but' is of improved or whiter color.

Thus by our invention we F secure advantageous results which are of great importance and value in the jewelryart andallied arts.

metals in our new alloy, within substantially the limitations indicated, without departing from the spirit and scope of the invention, and we do not wish to be understood as restricting ourselves except as required by the following claims when construed in the light of the prlor art.

Having h s scribed our invention, what we claim is:

1. An alloy comprisin' palladium, rhodium and ruthenium in su stantially the proportion of seventy-five percent (7 5%) to ninety-eight percent. (98%) of palladium, twenty-four percent (24%) to one percent (1%) of rhodium and the rest ruthenium.

2. .An alloy comprising. substantially ninety-five percent 95%) of palladium, threepercent (3%) of rhodium and two percent (2%) of ruthenium. v

HARRY KLAUSMANN. HENRY R. KIEPE.

may e used alone with palladium, to the exclusion oftheother, in proportions of twenty-five percent (25%) to one percent.

(1%) to seventy-five percent to ninety-nine percent (99%) of palladium, a

good. average working proportion being eighty-five percent of palladium to fifteen percent (15%) of either rhodium or ruthenium, With the addition of ruthenium to palladium ,in this way an alloy .is obtained which is harder than palladium without much change in color, whereas by the addition of rhodium to palladium an alloy is obtained which has substantially the work As we have indicated, changes and modifi-' cations'may be made in the proportions of 

